Finalists COSL 2024
| Name of the Candidate | School | |
| 1 | Adshaya Sutharson | St. Bridget’s Convent, Colombo |
| 2 | Akila Chamodya Bandara | Kingswood College, Kandy |
| 3 | Balacharige Udula Anjana Imantha | Rahula College, Matara |
| 4 | Dimuthu Wathsala Wijethunga Pathiranage | Mahinda College, Galle |
| 5 | Dulyana Apoorva Wanigasooriya | Thurstan College, Colombo |
| 6 | Havindu Dulaj Fernando | Royal College, Colombo |
| 7 | Imash Rajishan Fernando | Royal College, Colombo |
| 8 | Imasha Dilina Dayananda | Ananda College, Colombo |
| 9 | Isula Abeysinghe Gunawardena | Ananda College, Colombo |
| 10 | Januki Vihasna Cooray | Badulla Central College, Badulla |
| 11 | Kaveesha Manthila Weerawickrama | Mahinda College, Galle |
| 12 | Kenul Luthmin Perera | Lyeceum International School, Wattala |
| 13 | L B S D DE SILVA | Badulla Central College, Badulla |
| 14 | Loku Gamage Ashansa Lokarthee Samaranayaka | Sujatha Vidyalaya, Matara |
| 15 | Naduni Tharushika Rajapakshe | Girls’ High School, Kandy |
| 16 | Nesith Lakvindu Hettiarachchi | Ananda College, Colombo |
| 17 | Nisal Harinda Udawatte | Trinity College, Kandy |
| 18 | Pasan Rakmitha Kaluarachchi | D. S. Senanayake College, Colombo |
| 19 | Pelanda Appuhamilage Hesandi Sandeera | Visakha Vidyalaya, Colombo |
| 20 | Robolge Pahanma Upani Lenora | Sanghamiththa Balika Vidyalaya, Galle |
| 21 | Sachila Hirunjith Pathirana | Ananda Collage, Colombo |
| 22 | Sanaathanie Athiththan | Methodist College, Colombo |
| 23 | Savindu Aman Kahandagamage | Richmond College, Galle |
| 24 | Senithu Lakvin Hemachandra | Eheliyagoda National School, Ratnapura |
| 25 | Sithupa Danithu Nethmina Palihawadana | Royal College, Colombo |
| 26 | Sreemaathuri Sinthanaichselvan | Ramanathan Hindu Ladies’ College, Colombo |
| 27 | Srikaran Menan | St.John’s College, Jaffna |
| 28 | Tharindeesha Dulmini Kumari Ratnayake | Musaeus College, Colombo |
| 29 | U. A. Githma Himakara | Richmond College, Galle |
| 30 | Vajra Neth Wijesooriya | Ananda College, Colombo |
| 31 | W.D.Minadith Lakneth | Ananda College, Colombo |
Finalists COSL 2023
| Name of the Candidate | School | |
| 1 | Angulugaha Gamage Dineth Dilwan Gamage | Royal College, Colombo |
| 2 | Arani Ramesh | Ramanathan Hindu Ladies College, Colombo |
| 3 | Ashen Umendra Perera | Dharmaraja College, Kandy |
| 4 | Balasooriya Mudiyanselage Sachithra Bandara Hindagolla | Maliyadeva College, Kurunegala |
| 5 | Bhagya Poorni Jayasinghe | Maliyadeva Balika Vidyalaya, Kurunegala |
| 6 | Don Nipun Dinuka Adikari | De Mazenod College, Kandana |
| 7 | Dulyana Apoorva Wanigasooriya | Thurstan College, Colombo |
| 8 | Endera Arachchige Sandini Vihanga | Visakha Vidyalaya, Colombo |
| 9 | Isitha Dinujaya Arachchi | Ananda College, Colombo |
| 10 | Janith Vishula | Dharmaraja College, Kandy |
| 11 | Janithya Sanathmi Rajasekara | Maliyadeva Balika Vidyalaya, Kurunegala |
| 12 | Kannan Bavithran | Jaffna Hindu College, Jaffna |
| 13 | Kuragodage Thisarindu Adeepa Lakshan | Richmond College, Galle |
| 14 | Lasan Sanjula Perera | Ananda College, Colombo |
| 15 | Nesith Lakvindu Hettiarachchi | Ananda College, Colombo |
| 16 | Nethmi Nureka Moragoda | Devi Balika Vidyalaya, Colombo |
| 17 | Nirmala Dhamma Warushavithana | Royal College, Colombo |
| 18 | Rajapaksha Koralalage Januli Divanjana Caldera | Lyceum International School, Panadura |
| 19 | Robolge Pahanma Upani Lenora | Sanghamiththa Balika Vidyalaya, Galle |
| 20 | Senumi Nudara Weerackody | Visakha Vidyalaya, Colombo |
| 21 | Sithupa Danithu Nethmina Palihawadana | Royal College, Colombo |
| 22 | Sriskandarajah Aswethan | S.Thomas’ College, Mount Lavinia |
| 23 | Sudam Kovida Munasinghe | Richmond College, Galle |
| 24 | Thanuri Dahamsa Weerasinghe | Lyceum International School, Nugegoda |
| 25 | Thisura De Alwis | S.Thomas’ College, Mount Lavinia |
| 26 | Thuvarahan Chandrakumar | S.Thomas’ College, Mount Lavinia |
| 27 | U.A.Githma Himakara | Richmond College, Galle |
| 28 | Uthayakumar.Kamshagini | Arunodaya College, Jaffna |
| 29 | Vithyashakar Anandajothy | Jaffna Hindu College, Jaffna |
| 30 | Yehan Sandes Jayasuriya | Royal College, Colombo |
Finalists COSL 2022
| Name of the Candidate | School | |
| 1 | Abisheka Ratnakumar | St.Cecilia’s Girls’ College, Batticaloa |
| 2 | Anandajothy Vithyashakar | Jaffna Hindu College, Jaffna |
| 3 | Apirami Hani | Vembadi Girls’ High School, Jaffna |
| 4 | Arani Ramesh | Ramanathan Hindu Ladies College, Colombo |
| 5 | Benuljith Mindula Karunarathne | Royal College, Colombo |
| 6 | Dayan Nivain Samarasinghe | S Thomas’ College, Mount Lavinia |
| 7 | Eshan Induwara Bandara Ilukkumbura | Maliyadeva College, Kurunegala |
| 8 | Fathima Zainab Nawas | Akurana Muslim Balika Maha Vidyalaya, Kandy |
| 9 | Fikry Ahamed Nuhuman | Zahira College, Gampola |
| 10 | Kannan Bavithran | Jaffna Hindu College, Jaffna |
| 11 | Kirathy Sithambaresan | St.Cecilia’s Girls’ College, Batticaloa |
| 12 | Lokuwaduge Thevinu Jeewanjith Fernando | Rahula College, Matara |
| 13 | Nelushi Vithanachchi | Visakha Vidyalaya, Colombo |
| 14 | Nilakna Disiwari Warushavithana | Visakha Vidyalaya, Colombo |
| 15 | Pasindu Darshana Dodampegama | Dharmaraja College, Kandy |
| 16 | Pramudi Bashani Munasinghe | Sujatha Vidyalaya, Matara |
| 17 | Praveen Charuka Thennakoon | Balangoda Ananda Maithreya Central College, Ratnapura |
| 18 | Praveena Kanagarajah | Pushpadana Girls’ College, Kandy |
| 19 | Ramachandran Karthik Pravin | D.S.Senanayake College, Colombo |
| 20 | Ranasinghe Kavinda Chathuranga | Nalanda College, Colombo |
| 21 | Samadhi Sathsri Ransarani | Visakha Vidyalaya, Colombo |
| 22 | Sandaru Thathsara Balahewa | Mahinda College, Galle |
| 23 | Sansika Suhan Waduge | Royal College, Colombo |
| 24 | Senumi Nudara Weerackody | Visakha Vidyalaya, Colombo |
| 25 | Shasmitha Akashwara Liyanage | Mahinda College, Galle |
| 26 | Siluni Sandanima Wickramathilake | Mahamaya Girls’ College, Kandy |
| 27 | Sivakonesan Gobiram | Jaffna Hindu College, Jaffna |
| 28 | Sudam Kovida Munasinghe | Richmond College, Galle |
| 29 | Thanasri Unasuthan | Manipay Ladies College, Jaffna |
| 30 | Thiyumi Amaya Samarakoon | Visakha Vidyalaya, Colombo |
| 31 | Vasanthamohan Sasangan | St.Michael’s College, Batticaloa |
| 32 | Vishmaja Pooranakumaran | St. Bridget’s Convent, Colombo |
Finalists COSL 2020
| Name of the Candidate | School | |
| 1 | Ravindu Sanwara | Ananda College, Colombo |
| 2 | Arulanantham Abbinanthan | J/Jaffna Hindu College, Jaffna |
| 3 | Sajini Nadara Boyagoda | Girls’ High School, Kandy. |
| 4 | Nadun Naveendra Rajapaksha | Dharmaraja College, Kandy |
| 5 | P. Navodi Bhagya Wijesekara | Sirimavo Bandaranaike Vidyalaya |
| 6 | Thishanka Alahakoon | Dharmaraja College Kandy |
| 7 | Uvindu Praveen Sumanasekara | B/Badulla Central College, Badulla |
| 8 | P.B.K Sanjana Gimhani Kapukotuwa | Maliyadeva Balika Vidyalaya |
| 9 | Niluka Bandara Marasinghe | Kingswood College, Kandy |
| 10 | Thinupa Anjana Wijetunga | Richmond College , Galle. |
| 11 | Jeyanandarasa Kirushikan | Jaffna Hindu College, Jaffna |
| 12 | Sureshkumar Miruthy | J/Vembadi Girls’ High School, Jaffna |
| 13 | Samith Kavishke Karunathilake | BD/ Central College, Badulla |
| 14 | Uditha Sandaruwan Wijeratne | Dharmaraja College, Kandy |
| 15 | P.L.Pamudi Maleesha Mendis | Southlands College, Galle. |
| 16 | Akesh Samuditha Gunathilake | St. Anne’s College , Kurunegala |
| 17 | Malitha Pasindu Lankanayake | Maliyadeva College, Kurunegala |
| 18 | Isuri Udarika Elawella Liyanage | Girls’ High School, Kandy. |
| 19 | Janani Nethmini | Girls’ High School , Kandy |
| 20 | C N Weerasinghe | Kingswood College, Kandy |
| 21 | Pramujitha Banuka Ariyaratne | Trinity College, Kandy |
| 22 | Chanupa Devnith Wijesinghe | Richmond College, Galle. |
| 23 | Dinithi Shalika Madhubhashini | Southlands College, Galle |
| 24 | I Anfas Ahamed | KM/KM/Zahira College, Kalmunai |
| 25 | Dulitha Hasith Deiyagala | Harischandra National College, Negombo |
| 26 | K.B.R.Dushan Balasooriya | Ananda College.Colombo 10. |
| 27 | Karunairasan Makarathan | Talawakelle Tamil Maha Vidyalayam |
| 28 | Kaveesh Shamantha Perera | St. Joseph Vaz College, Wennappuwa |
| 29 | A.P.Sithum Minthaka | Ananda College, Colombo 10. |
| 30 | K C K Manawathilake | Dharmaraja College, Kandy |
| 31 | M.B.Shakindi Vihangana | Sujatha Vidyalaya,Matara |
| 32 | Lasith Gaurauv Balasooriya | Mahinda College, Galle |
| 33 | Amandi Dilshara Samarawickrama | G/Sanghamiththa College, Galle |
| 34 | Avanika Varatharasa | J/Vembadi Girls’ High School, Jaffna |
| 35 | P D Misal Lakdinu Kumarasiri | Bd/ Central College, Badulla |
| 36 | Buddhi Saumye Kumara | St.Sylvester’s College, Kandy |
Finalists COSL 2019
| Name of the Candidate | School | |
| 1 | Sugath Ravindu Sanwara | Ananda College, Colombo 10 |
| 2 | Thishanka Alahakoon | Dharmaraja College, Kandy |
| 3 | R. M. P. Akila Prabodha Rajapaksha | Bandaranayake College, Gampaha |
| 4 | R.M.N. Nirasha Rathnayake | St. Joseph’s Balika M.V , Kegalle |
| 5 | Arulanantham Abbinanthan | Hindu College, Jaffna |
| 6 | O. V. Visura Prabod Jayanandana | Rahula College, Matara |
| 7 | Sanjana Gimhani Kapukotuwa | Maliyadewa Balika Vidyalaya, Kurunegala |
| 8 | Pamudi Mahinsa Jayalathge | Sanghamiththa Balika Vidyalaya, Galle |
| 9 | Anisha Jude Joachimson | Chundilkuli Girls’ College |
| 10 | R P G M D Samaranayake | Maliyadewa College, Kurunegala |
| 11 | K. G. Thilakna Randinee Kumaratunga | Mahamaya Girls’ College, Kandy |
| 12 | Pavindu Udeesha Jayasekara | Richmond College, Galle |
| 13 | S. Tharsikan | Hindu College, Jaffna |
| 14 | Buwaneka Avishka Bandara Epakanda | Dharmaraja College, Kandy |
| 15 | H.M.P.B.Ariyaratne | Trinity College, Kandy |
| 16 | K.H. Thushan Chamika | Rahula College, Matara |
| 17 | N. D. Kasun Tharindu Lakshan | Ibbagamuwa Cental College |
| 18 | Sanduni Jananika Ubayasiri | Mahamaya Girls’ College, Kandy |
| 19 | W. M. B. S. K. Wijenayake | St. Sylvester’s College, Kandy |
| 20 | Namina Kaushalya Wijethunga | Bandaranayake College, Gampaha |
| 21 | Jeyanandarasa Kirushikan | Hindu College, Jaffna |
| 22 | Sachintha Tashen Paranga | Richmond College, Galle |
| 23 | Dithira Yasasvin Wellappuli | Rahula College, Matara |
| 24 | Nilushi Navodya Dhanapala | Mahamaya Girls’ College, Kandy |
| 25 | Piumini Kaveesha Ranasinghe | Viharamaha Devi Girls’ College, Badulla |
| 26 | Bhanuka Lakshan Arandara | C. W. W Kannangara MMV, Mathugama |
| 27 | Thinupa Anjana Wijethunga | Richmond College, Galle |
| 28 | Hansa Niluka Bandara Marasinghe | Kingswood College, Kandy |
| 29 | Nimaya Sandamini Siriwardhane | Sirimavo Bandaranayake Vidyalaya, Colombo 07 |
| 30 | Hansaka Gayan Somaweera | Bandaranayake College, Gampaha |